Update doc to reflect new Goldfish source locations

+ update docs/ANDROID-QEMU-PIPE.TXT to include missing
  description of "parameters block" access mode.

Change-Id: I02b96ebd484d524410b4c5d8a780cf36596d908b
diff --git a/docs/ANDROID-MEMCHECK.TXT b/docs/ANDROID-MEMCHECK.TXT
index 0c5e716..01e8ccf 100644
--- a/docs/ANDROID-MEMCHECK.TXT
+++ b/docs/ANDROID-MEMCHECK.TXT
@@ -25,7 +25,7 @@
 and libc use a "magic page" that is set up in such a way that every write to
 that page on the emulated system produces some sort of event in the emulator,
 allowing emulator to receive data that emulated system has written to the "magic
-page". For more info on that, see hw/goldfish-trace.c
+page". For more info on that, see hw/android/goldfish/trace.c
 
 In response to events, received from libc.so, emulator keep tracks of all blocks
 that have been allocated from the heap on emulated system. Block descriptors are